Air handling units for cooling

Cooling with air handling units

Cooling is via chilled water or direct expansion (DX) heat exchangers. Both are fabricated by expanding copper tube to aluminium collar spaced fins at a suitable pitch to meet key design performance requirements. The fins are mechanically bonded, providing excellent heat transfer characteristics, with staggered tubes in the direction of the airflow. Special materials and finishes, such as copper fins and electro tinning, can be provided to meet particular specification requirements.

Chilled water coils
The coil framework is a rigid galvanised formed section and the coil tubes are brazed to copper headers with flow and return screwed or flanged connections. Coils are also fitted with an air vent and drain plug as standard.

DX coils
The framework is a rigid galvanised formed section with the coil interlaced to suit compressor load requirements, while the liquid lines are brazed to distributors. Moisture droplet eliminator and drain pans are fitted as standard to all sections and all pipe and drain connections are fitted with flexible bushes to ensure an airtight seal and good vibration isolation.